Unit Conversions
Convert 1.5 kilometers to meters.
1500 m
Which coefficients would balance the following equation:
_Fe+ _O2→ _Fe2O3
4,3,2
What is the name of the following compound
CaCl2
Calcium Chloride
Consider the following reaction at equilibrium:
N2(g)+3H2(g)⇌2NH3(g)
Kc =4.34×105
Is this reaction product or reactant favored
Positive K value means product favored
What is the molecular geometry and bond angles of
CO2
Is it polar or nonpolar?
Linear, 180 0 , NP
A summer day reaches 95°F. Convert this temperature to degrees Celsius (°C).
35.0 °C
Calcium carbonate (CaCO₃) decomposes upon heating to form calcium oxide (CaO) and carbon dioxide (CO₂). The balanced equation is:
CaCO3→CaO+CO2
If you start with 50.0 g of CaCO₃, how many moles of CO₂ are produced?
0.499 mol of CO2
Write the formula for
Copper (II) Sulfate
CuSO4
What are the conjugate bases of the following compounds:
H20, H2SO4, HI, CH3COOH
OH-, HSO4-, H-, CH3COO-
What is the molecular geometry and bond angles of
NH3
Is it polar or nonpolar?
Trigonal-Pyramidal, Polar, <109.5
A grain of salt weighs 0.1 milligrams (mg). Convert this mass to micrograms (µg).
100 µg
Magnesium (Mg) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl₂) and hydrogen gas (H₂). The balanced equation is:
Mg+2 HCl→MgCl2+H2
If you react 12.0 g of Mg, how many grams of H₂ will be produced?
0.994 grams of H2
What is the name of the following compound
N2O5
Dinitrogen Pentoxide
Arrange the following compounds by increasing acidity:
HF, HI, HBr, HCl, H20
H20<HF<HCl<HBr<HI
What is the molecular geometry and bond angles of
BH3
Is it polar or nonpolar?
Trigonal Planar, 120, NP
A bacterium's mass is approximately 1.2 picograms (pg). Convert this mass to nanograms (ng).
0.0012 ng
Hydrogen gas reacts with oxygen gas to form water. The balanced equation is:
2 H2+O2→2 H2O
If 75g of H20 was produced when 10.0 g of H₂ reacts with excess oxygen gas, what is the percent yield?
84.1% yield
What is the name of the following compound:
Fe2O3
Iron (III) Oxide
Calculate the pH of a solution that has a [OH-] of 2.5x10-8. Is the solution Acidic, Basic, or neutral?
Slightly acidic solution with a pH of 6.34
What is the molecular geometry and bond angles of
CO32-
Is it polar or nonpolar?
Trigonal Planar, 120, NP
The energy required to melt a block of ice is 150 kilocalories (kcal). Convert this energy to joules (J).
Hint: 1 calorie = 4.184 joules.
627,600 joules
Nitrogen gas (N₂) reacts with hydrogen gas (H₂) to form ammonia (NH₃). The balanced equation is:
N2+3 H2→2 NH3
If you have 5.0 g of N₂ and 2.0 g of H₂, which reactant is limiting, and how many grams of NH₃ can be produced?
N₂ is the limiting reactant, and 6.08 grams of NH₃ will be produced.
Write the formula for
Manganese (IV) Carbonate
Mn(CO3)2
Write the equilibrium expression of the following equation:
Fe2O2(s)+3CO(g)⇌2Fe(s)+3CO2(g)
Kc= [CO2]3/[CO]3
What is the molecular geometry and bond angles of
HOCl
Is it polar or nonpolar?
Bent, <109.5, Polar